Noble Press: The mouse itself feels great if you are one for large mice. The Performance Mouse MX has a weight to it that most mice cannot achieve, this is partially due to the battery inside of it. The single AA battery last over 10 hours in constant use. I found that when using the mouse 5 hours a day, three times a week, I was able to get two weeks on one charge. If you happen to use this mouse as your desktop mouse, you can charge the mouse during while awake with the convent mini USB charger.